Depends on what you need done on what, but I bet I could tackle it or one of the other gunsmiths around here. As for offical H&K Armorer's go I don't think I've seen one since I moved here. Good luck none the less.

I have a friend that's been through their armorers course. He does not do gunsmithing full time but I would trust him to either do it right or tell me up front if he can't. Not the risk taking type when it comes to weapons. If you'd like to IM me and tell me what you need done I can check with him and find out if he could do the work for you.